Two scenarios are mapped here, projecting changes to the Earth’s average surface temperature at the end of this century. Models are based on low levels and high levels of human-caused greenhouse-gas emissions. 0 0.5 1.0 1.8 3.6 7.2 12.6 19.8 1.5 2 3 4 5 7 9 11 CHANGE IN DEGREES CELSIUS FAHRENHEIT Rising temperatures 1950s-era–emissions levels High greenhouse gas emissions 1980 50 100 150 200 250 1990 2000 2010 STORED HEAT (in 1021 joules) Upper ocean Deep ocean Ice Land Air Where heat is stored Scientists say much the excess carbon dioxide given off by fossil-fuel burning is absorbed by the oceans, which also take up most of the excess heat energy that would otherwise be going into the atmosphere. As a result, the oceans are becoming warmer and more acidic, and sea levels are rising.

SOURCE: IPCC Fifth Assessment Synthesis Report. GRAPHIC: Patterson Clark - The Washington Post. Published Nov. 2, 2014.